{
  "manageEntity": {
    "action": "Save",
    "entityId": "873035980",
    "entityType": "Track",
    "nonce": "0xa067ffdc7a6afa6dd40e78a4a0f32937d021c197b1977b387b947f430ac86a13",
    "signature": "0x181e8a5958fb8aef95db71d3380e3a2cff0f83accf48571d46380f3b14cccca228177c3cc9e90c2cd052ab3526458d8ef32cee6581e4987b5c532ca41a5524e91b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}