{
  "manageEntity": {
    "action": "Save",
    "entityId": "345905",
    "entityType": "Track",
    "nonce": "0x6376f65c7622e0c3ded6daa1fa878e0ed35edd5d034db61fb092d2b7ee011c09",
    "signature": "0xce985ed91f6b1194f0202320c33663b7c71370b8af117c915216b86cf9f4035139cf88f9521ddba8935ed5d8b5e4b837f67ea05adc07fbd4103ac00e5c64e7b61b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}