{
  "manageEntity": {
    "action": "Save",
    "entityId": "1327919531",
    "entityType": "Track",
    "nonce": "0x52eb9a2a95c387334f24473b12afa2477e82f818b1038826f05fc2932475a117",
    "signature": "0x93fec23ec9f155a1ab8a098262b8f59a218fbfdd059e7212f25caa8920d02e5d1463d6fdfc4f0a27bd0c62f5cce8438984bbf025e501c516d9b7ac31d9b23c321c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}