{
  "manageEntity": {
    "action": "Save",
    "entityId": "801970",
    "entityType": "Track",
    "nonce": "0x934b2d048863d9b97628659ca639bef84f3736327eb3692330cabfa187d95ce0",
    "signature": "0x7107c7c76b1dbfa637796ff40f0ed5cc6df82c68b339990b69abffbc8c4a7bb44fdcd1d4d0eb30b86414cbd96cc51c74307102471fe5032ea07d3a3ac3668fb71b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}