{
  "manageEntity": {
    "action": "Save",
    "entityId": "1870556914",
    "entityType": "Track",
    "nonce": "0xf67d312a6173d1fa54b9687c9510837e9751250841a1152398c149b6cbd8f21e",
    "signature": "0x1350ac8d63dbda215e8bc8c5c7b7eb9eed67ce6886566d7ffdd8790b33ff74310a30c6c025f4eb3ade803b4d7a589fd7167298e5d84dff16c2cb38ccb8e82f001b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}