{
  "manageEntity": {
    "action": "Save",
    "entityId": "720179464",
    "entityType": "Track",
    "nonce": "0xc6643606249e02039854f46360fa0a352c60961b73b48e351ede19d18aa41f1b",
    "signature": "0x8fcf276de6daac4d1c1daec94dec78086d99ff87ac3db408ae87334c556ccee812dbb0723a5af5d9f86c98581d3f81d7644e07a92ad3c2ebd2c2e0dc5f40296d1b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}