{
  "manageEntity": {
    "action": "Save",
    "entityId": "1041590822",
    "entityType": "Track",
    "nonce": "0xb39e0d9a7fe50f8564ee187184838102927e66410de6951272d9d06f9c2523dc",
    "signature": "0xdaef0a421dd19bf4a942c04319680575f95ddf897e546cfb6367d8da46b1d2af7396010b2f3e9462fb2fb5d6b4f241ac0fedc662de99326ee95917923dc498461b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}