{
  "manageEntity": {
    "action": "Save",
    "entityId": "623387627",
    "entityType": "Track",
    "nonce": "0xa4e8e3fb7d641e0aa917e18812c72321a19480877cceb5b7bc24bb5782f23426",
    "signature": "0xff2efc1150923ddc425c95417b85e66d662bf3d3c118e25cb8b7737c93a61a091a63a52ee572f9ec5daafa053d3b11fa22c1f40315ea2070019b1820882fd7ff1c",
    "signer": "0xC59f7055B078B1Ee57c271E19BE5Dd7033FD64f5",
    "userId": "950751701"
  }
}