{
  "manageEntity": {
    "action": "Save",
    "entityId": "490309",
    "entityType": "Track",
    "nonce": "0xd4351c32802b01ebe5843bccaa74e04ffed76170997b68ca274de3716775e037",
    "signature": "0x662d1b8d8f92ba5cd9a16e2c305f3363b2f302477322bfa9b26c6695754c8dc6341bf254a469fea73527d45b2243f738651bfb0493f1a8071099cf819979a9c91b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}