{
  "manageEntity": {
    "action": "Save",
    "entityId": "940198280",
    "entityType": "Track",
    "nonce": "0x541862676979573605a34ddc312ece1bb84ae630eb6872dc70142ed23b09078c",
    "signature": "0x36e20435afa6730262e17310ad912ed1914beb2da9ac05b2dc340020d3dcf1cb1dabdee92739e65f4826bfc26e245cac0fbe78186a667d877225ad47985e30ac1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}