{
  "manageEntity": {
    "action": "Save",
    "entityId": "2103602565",
    "entityType": "Track",
    "nonce": "0x96be4284f4ca324ab0ac357954f5ef4285cc95d1f5a19d8bb474b1f483c7b2a5",
    "signature": "0x554bbbc860ffba996c646f059c56bb53f7a0b9619a7d85b70ba59cd81c2debb63979a0b2390d0832c160a63d8bce79fdb6a4472cbb8dc775dc3ee0e4c2d6de921b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}