{
  "manageEntity": {
    "action": "Save",
    "entityId": "1183356801",
    "entityType": "Track",
    "nonce": "0x4c72211634c6ef299e9d369613a212eda8adab99a08d1afc1cb1bc8846a58118",
    "signature": "0x7a1b4e775fdfeb58d9ae84f8f3791570de489c6095b7ed62352b92e473828fe175db9c067596068859fbe4a2b7a836c54955753b67666c43918fbf0e9d43fd351b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}