{
  "manageEntity": {
    "action": "Save",
    "entityId": "715772810",
    "entityType": "Track",
    "nonce": "0x22b0a09f14ed64f5ce12eb33762fc969ed57e44aac5eccdd8ad12d73ebbb53f6",
    "signature": "0x513e1e34e30aa618e69d006be55cf22d9ed91a066507b9991527fa93bc40aba111eef41a5d485d271c038042acbf810bee763b9d2118e8195b4f6f97475d6a471c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}