{
  "manageEntity": {
    "action": "Save",
    "entityId": "969166254",
    "entityType": "Track",
    "nonce": "0x2b58a745978c137d7989880c8de16c93044b43f4f328184406acb84af74e62e8",
    "signature": "0xe2e734cce4ba1d979d2a557351394692ec0870ec66fa4a338b0cfc5fb5c236412704df7540062a37f3a1e95d4e26bff4b7b0e659dba2673e628759ec0ce7fc5a1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}