{
  "manageEntity": {
    "action": "Save",
    "entityId": "1266698361",
    "entityType": "Track",
    "nonce": "0x15e15d4e1beeb9af9091d8e6bb01e4bc09cacb4d5187d8b08073b277abc2c400",
    "signature": "0x0bcd4819f8d8636fb08136b1fdcb8313f7358f2e1de8e0b8f416c61248fa3d951d45e60ce6cde84c33cb1adf1ac2df6b105f9ecc280aae70ad52b0ed483377051c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}