{
  "manageEntity": {
    "action": "Save",
    "entityId": "685733863",
    "entityType": "Track",
    "nonce": "0x510f9a5ccfebaf24508c7c182841972dfbd58288712f9bc25d7c953786d61545",
    "signature": "0x46a94002692fcd1887e266e4a1e57ff14c149cb9e6761cbaaccf8fb4c801d63234cfcf934071dcf6b4101ce23463d659b7cd3d7c36f73a1b46aa630a92c030d61b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}