{
  "manageEntity": {
    "action": "Save",
    "entityId": "2016476472",
    "entityType": "Track",
    "nonce": "0x9a49c67a4b9308a17fc94ca06cdadabc3ced8c8328fc06aa6cdf280456078bb9",
    "signature": "0xfece15a906bf6a62a0fc32b3bdbc17bf6e5a0a005f8d0e3dc7b43f3a86e48a6a0c52c58f7e65c7819802e43e88ddc7789ef63706b2b24006273b168cd9bcf3841b",
    "signer": "0xd85E4A094e4C057572A9D525C9737051A17ab609",
    "userId": "696716320"
  }
}