{
  "manageEntity": {
    "action": "Save",
    "entityId": "894225023",
    "entityType": "Track",
    "nonce": "0x49bcde2c75e07f5799eb44dccc338467d183353368da2a1f65a9ebf285fc7cb8",
    "signature": "0xa94c53f90139c70f6aa91df2e47b1dcbe214464ee58fbbef73120b947f1995da297127bc7c8636254f39e7dde03e4c3ca40002ae6eea72f2ae9c53e3582c4ffd1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}