{
  "manageEntity": {
    "action": "Save",
    "entityId": "99945595",
    "entityType": "Track",
    "nonce": "0x6ad6c733e8545bccd58a59f54408b8b5f5aa2e569e328c31042ba6301dfc7a12",
    "signature": "0x3b128bcd7a1b4d579543826136628d2f32485d7f72040dca9bb678ba4d5bf75465359689191c4c94b81aa02de170825152263d7a73f5695d96e3c6a1bdb8295b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}