{
  "manageEntity": {
    "action": "Save",
    "entityId": "457978407",
    "entityType": "Track",
    "nonce": "0x7c13cb9277cfd38ebf265b0fb8335b981adeb0f5fb6bec295d02185a1ec1604a",
    "signature": "0x27d47cf5e6401acd254d64c66bf0065ba438a8f74a9cb8033c10e486c5df0e29141423d968c9155e993a8c52d9ecb7c511018dbe35db596158c70d94218b0d171b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}