{
  "manageEntity": {
    "action": "Save",
    "entityId": "393130553",
    "entityType": "Track",
    "nonce": "0x0bba2a010d55a36fa4915a74567bdf5adaefcb7f36094327f869976b9506926d",
    "signature": "0x869911c7d85b9adff34f01ee10c4baac1c061b21bcaeed211307c9216f045dd31e9b5e0f556f5d2cdd7bbeeaa0d5e994a5f008bd6dcab2a019661c99b1741c071b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}