{
  "manageEntity": {
    "action": "Save",
    "entityId": "783847",
    "entityType": "Track",
    "nonce": "0x310cddb951d6d764027db2c0d35dd30bafd4229907fb2936d40d7bb83615b756",
    "signature": "0x98c1f7c65b0a88683b76066335156040a7ef771455af9bbc50681c495b1b1e9d5011297fd6e167dc9f199228fd47b6d6be885d15599fdf717d53b14d8015db3f1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}