{
  "manageEntity": {
    "action": "Save",
    "entityId": "169486141",
    "entityType": "Track",
    "nonce": "0x1c4613f24872de1eb601c5672390d44bf913981f76b542d1c359b854600b1179",
    "signature": "0x2ba25de4f6270dd42864616babb5dc0cff07e221887361134b256c5f8201ac9c5c24126c4ec6eb70e9cd89c8112340f775b6a4f3a09cee44c0e4b54e431a6b5d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}