{
  "manageEntity": {
    "action": "Save",
    "entityId": "1600061194",
    "entityType": "Track",
    "nonce": "0x1bfeb17aef2b5ca8466b7b9b20eb100e70c2aeaa2039d3e7606f007bd2e48a6d",
    "signature": "0x242f56355666634d75ca4d6232032d9b8559340bae867d434d043edde1e9003765b349dbbf785e5b7549a4ff7404b54e6ca39c734a81399a46bb79bd667642271b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}