{
  "manageEntity": {
    "action": "Save",
    "entityId": "221443722",
    "entityType": "Track",
    "nonce": "0x5e074955532b48b450322500781ddc24427dfcdbf20efdc6d5822998d06c0d31",
    "signature": "0x280f0c4b7bb60f40d180018821d1dd6b7f72f23bb9a28e2f19036f2766bc136166dfeb1d2872e037b4c40df2d8014fa053edf025e6ffbd6534f20bd3eed5763a1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}