{
  "manageEntity": {
    "action": "Save",
    "entityId": "243905748",
    "entityType": "Track",
    "nonce": "0x7b087da7fd6c4490bfbdda250bbbf80c2aa56d0b321c8d836baf0576c60f7006",
    "signature": "0x5ad13cfe9b4895fe623bedbcb6723488cff325cbb191c74933925fe8d62be0ec2e7c43dfd6c8327faf9c98eaa55782f9c5cea8ee43d072f4847a53a72cf5baf11c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}