{
  "manageEntity": {
    "action": "Save",
    "entityId": "636351566",
    "entityType": "Track",
    "nonce": "0xa9fe64eefb060e7e4ecbf62734746a2d7ee649265424c0c2be984d3658d3cc94",
    "signature": "0x2b92fa15573f35b780826b85b9b9a1590d2939f6f83d5561729703457118e4741747c85280f2979d95f48f4b1d984c0c7f545197b7b3a8110e2dc565205f35221c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}