{
  "manageEntity": {
    "action": "Save",
    "entityId": "1425579287",
    "entityType": "Track",
    "nonce": "0xaea4500e2903451f1652dd96212081a74a41e9b5ec0ea53d9216b90af262167e",
    "signature": "0x280fc46ba511767e10f50cee7de394b14bc3a0b28e8f2c1dcafb31f5c52cf9381031730cd6a0e66072ddbcbbdddc4842fadfc252a67aa1ac67778da5c47ade981b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}