{
  "manageEntity": {
    "action": "Save",
    "entityId": "1440248945",
    "entityType": "Track",
    "nonce": "0xa5c28d487f53e46f780c2f9f3be7af66a22cfb1543b08f9be5b8c5246d326fb1",
    "signature": "0x3a622446f165acd388a3fbbf833300820e4a254cbd87fa95c72c4160a94e76804b3e19f01dbf4b1948ba13d4b78e020ef8eb4134e7b3b7ee3dc9ed953b7c8e841c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}