{
  "manageEntity": {
    "action": "Save",
    "entityId": "1761447376",
    "entityType": "Track",
    "nonce": "0x675b4bec6fa4d25b35371c6f291480d7b8ca5814c1ecd8c807c98f7548cc8070",
    "signature": "0x64611fc8a4b217fb6f3cd71bfe18982548cba80e88d4ef1c06b3b1fbb2fcd15e27fb02c6a63d6f4313031784187655e2f6a03d0bcfa6b12fbb941f870646e12f1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}