{
  "manageEntity": {
    "action": "Save",
    "entityId": "2139329753",
    "entityType": "Track",
    "nonce": "0x1fbd5c5295f6f80177cc5927bc3e93cce35877bb90e01963ab7c002b13156fd2",
    "signature": "0x8db5355302eac6f0b3d242b86e7b69321529219c952bfe47ac8f0ed745b2bd2966fde692052f46b1f5cb5917b5d0aef27566e8b2ef5118ac75323276fb79da6c1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}