{
  "manageEntity": {
    "action": "Save",
    "entityId": "325160302",
    "entityType": "Track",
    "nonce": "0xc13e970b05f01c8e2ec245148fee406c9866d473c963efb56febe07189aa8992",
    "signature": "0x7c8270305560a6b06422469c60641fdf5fd20a22e20f105bea76051c4b6a16011b650b432a5823af67db1c82d66f5af3602152533976d8653d91558699ec8bb61b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}