{
  "manageEntity": {
    "action": "Save",
    "entityId": "1305766829",
    "entityType": "Track",
    "nonce": "1792468040535275147",
    "signature": "0x23cc7ee826b5b2a00c65052f0682a5926ebcce56f40a41e2cf71a29faf52c6631763707c9305d4939b9eb918505dfe778abf526223163175ceae1c7f868fbc291b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}