{
  "manageEntity": {
    "action": "Save",
    "entityId": "1472762032",
    "entityType": "Track",
    "nonce": "0x8605c557fb18dab4dd5e8fb1010184952e458519e2b1d49e602ec9c86a346126",
    "signature": "0xac5ee9881df8c615b600da5e88f766fd01f27a78818fdfc6ee14db38e4d90862686ee3e9fdf563bc31fce49d0972aa50d5b7c06ac1ca8a947fc4a1cac3c72e031c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}