{
  "manageEntity": {
    "action": "Save",
    "entityId": "762167664",
    "entityType": "Track",
    "nonce": "0x434b9c94f67faa8ff0d6b0dc21bd13a8f1a10fee2abe5079aabc4066656e4d00",
    "signature": "0x971168d690ed3ee58e62764c08791efc6bd98f206927fd98474db455638637de75915e7039a35200c875221728cf74405c5c5847da4175f676836a80509a310e1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}