{
  "manageEntity": {
    "action": "Save",
    "entityId": "2124510455",
    "entityType": "Track",
    "nonce": "0xed28e7782d683aa553f2930014f89b25b40bf8604b3bbc94e3f0f34b04733b14",
    "signature": "0x8e4a0d769e952cbf296a6b3b4c331e0d834f2c6a3b9d294f5c5c239b98c3a86865f56b1d56cf4922a32314a52eaac5e45abf9a2b1fb17923912f95a1ad1e34de1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}