{
  "manageEntity": {
    "action": "Save",
    "entityId": "5038",
    "entityType": "Track",
    "nonce": "0x0deef41f14076d0c25b89fc28bd6ca5127e2544f43bec52cf8c8bfca503b195b",
    "signature": "0x33bca2808d6f19df3dcf02ac4ec19085a2c4ad38c05bd69657d6460859d8c116243b0f914e70e6dba077540300204d876d96c2b0f44bb7091830918cedf08acd1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}