{
  "manageEntity": {
    "action": "Save",
    "entityId": "1866912086",
    "entityType": "Track",
    "nonce": "0x463707c64a8da946cab180154a0e51bc24fb04ae0935a23c4221b2489bebff00",
    "signature": "0x8400f3a3aadcb4b130355d2ca609d83f594c7f4eb86e9ed7443c2cbeb27df6523138d8b43bc5ea821b7bf32f6d658289572219a5858995d49e84ba79625c111e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}