{
  "manageEntity": {
    "action": "Save",
    "entityId": "1418749832",
    "entityType": "Track",
    "nonce": "0xa127c6984cb663a385dc9d8be6dbb3707cc9ec33eff7d63a38991eb3f6d03be4",
    "signature": "0x41296086556d6d0ebeb047cfb32e4ec6ec610557a30ad57e4072f58bd200d30f54df2040f7b60155674115ac0f9131c6b4b1b8c49be640908bda50deac64b60b1c",
    "signer": "0xD3bFb6B98DdA9816A3D70c5A1182B6e23fe7cF2b",
    "userId": "660253053"
  }
}