{
  "manageEntity": {
    "action": "Save",
    "entityId": "1776736706",
    "entityType": "Track",
    "nonce": "0x250e13ba89f893908d6fc9b5ce175e5423f7039039298c0cd92b1ba7eed5529d",
    "signature": "0x0b1ab83a1cabe8c49a0d66beb30ef408ed0a4c827187a094b26326729c1c8b163e959d7b0b3a8bda091589ea11d5c3e6f31e9406c33363256ba09490d61662291b",
    "signer": "0xa22176a11BF6703EFe39D488aA7cC06aa781C44A",
    "userId": "633924738"
  }
}