{
  "manageEntity": {
    "action": "Save",
    "entityId": "1054460943",
    "entityType": "Track",
    "nonce": "0xfefa95c6a2011f47fe655d4b9fe5c2e66e7df1b5fcef00b1d260af4c46cb2c66",
    "signature": "0x5edd6a4bd9003ce40d1d1122b99488db50f6a662349637a325daf30122dcf71e5df112d1066d19f05170e5663347194d69b94bdf5df30f67ec2c767c7492aeef1c",
    "signer": "0x7Fa5a67C00c48DCA54f12c80579B583FcD79a330",
    "userId": "527480232"
  }
}