{
  "manageEntity": {
    "action": "Save",
    "entityId": "1130347574",
    "entityType": "Track",
    "nonce": "0xc80d001fc33c17bffa488f7b8331584c7bf7c2eff5a1f2d926c5845f43fc9aa4",
    "signature": "0x30247fd6f815ef96703f4c266fbe9bf322101f5510e9a6c68ef16c00488e2cd851a012212661f1a3ec633188fe06a7dad98fb06a54827ce07d339c51b5fe947d1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}