{
  "manageEntity": {
    "action": "Save",
    "entityId": "1878245892",
    "entityType": "Track",
    "nonce": "0x9608128270ab205eb210e7b4426e4c7cf75533ce3c493109ea85a7c13eac62a3",
    "signature": "0x9d0677bcf21c4dd1153f7c6e6fb7499a06ca1f7504322dc649f742aa9ff709a92697827e431e7fbf4b448556ecebd2ee0849e1176c1d176cb4a05460a86cea6d1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}