{
  "manageEntity": {
    "action": "Save",
    "entityId": "1131775307",
    "entityType": "Track",
    "nonce": "0x5b7375c969188c6c263be74315f39654d98fd5c080309d6cce7eb2696c3a7e6b",
    "signature": "0x58d3f94eb4b0cf81c251f8bf58b03ec969b4bce6729e3aef36e89bdee4489dfc49a98cc05ec93c65e0810c68c4c53395f7e0fbe36dfa56a4d2f9bdfaefe7c69d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}