{
  "manageEntity": {
    "action": "Save",
    "entityId": "1351448094",
    "entityType": "Track",
    "nonce": "0x8e9567ff85bf6f344158cb55b0bd64a284b2be12134e1349610aacee52460d3b",
    "signature": "0xcba4bf0f3e59abe9f7da5603ffe4caa7da6682f684cece7efa189a547284dc0e4d06caac6b8194ca0eed2ff32c56e9c98d52080a1954f797266cc9ccb8333b4d1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}