{
  "manageEntity": {
    "action": "Save",
    "entityId": "295413167",
    "entityType": "Track",
    "nonce": "0x1e2972fe6475c6dd10300d2e63747b4c70e97b241002374a59d0238d0c73938a",
    "signature": "0xf85a21d61bf1d5fcf6f83db18c178f9e3a1eba05d0d17ec616aa82d9c18e90784eabd71c132c10fdfcf9fb8e0000ec9087d9525ed0d1f981caa7ee31aabd92d51c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}