{
  "manageEntity": {
    "action": "Save",
    "entityId": "1886610393",
    "entityType": "Track",
    "nonce": "0xc23a1883e9b4855990423bf9873cb0eaf0d5e01b84b506e474661982bf610069",
    "signature": "0x8d6b2e0faea5627f81b36805cfaae12a876d537e6897d0321acca2935ee15c2d5cda372a64a1a01ab815156658bf8d227d8512204287afae7eaf0fac38c407501c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}