{
  "manageEntity": {
    "action": "Save",
    "entityId": "351558519",
    "entityType": "Track",
    "nonce": "0x790341d3636de6e1029660d681c50884ca62a3dc55676b85d6568da867e6bb4c",
    "signature": "0xfa8a8032430f5c607305d314a0e2540bfb110aedcd96c1cd30593ed65e3a0a4768cd0693869ec6e0abf8ed1d8b3cb8cda7c851b1509e69e2b1e27b39f765bf071b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}