{
  "manageEntity": {
    "action": "Save",
    "entityId": "972733262",
    "entityType": "Track",
    "nonce": "0xcd76bec48d1cf89f419fc8290de81e1ca5637885a3d7fe5af17042a8a4175484",
    "signature": "0xbe789f2b5098aec0445079f75ae0fa9b127e350b6977624d899a3a09882ee3af4aa46afaa10106fc1552325688ad1a0256addc2429488073ef4457228725269c1b",
    "signer": "0x4993C3631eecd6e8c1635351A99C2103C7d6Be4b",
    "userId": "906184213"
  }
}