{
  "manageEntity": {
    "action": "Save",
    "entityId": "357265333",
    "entityType": "Track",
    "nonce": "0x61f8a38673d1c076f6632ac61492ed597ad2496a8ca347f500c9136160512bce",
    "signature": "0x9ef1b183dc5ad10626d23354613998bfefd78fefee8a82a28858246afa2b57703804f363d029de8e6ee268573df189ee44e8dd3334cdc00c75e3613f3e400eab1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}