{
  "manageEntity": {
    "action": "Save",
    "entityId": "1997337530",
    "entityType": "Track",
    "nonce": "0x1ddd9f598f41d659a4b680ee409c3277bfcafa5e32fbcbc362eadf4ade263863",
    "signature": "0x0cc07522755929b8a19d413279f78fb49ab156fe0d9cfb30e1acd0390a8cade16a775ec304404f9dabaf9e9e30ec2df1299108496db3e158d53129efe6019f801c",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "301637"
  }
}