{
  "manageEntity": {
    "action": "Save",
    "entityId": "222348592",
    "entityType": "Track",
    "nonce": "0x6b7a11fb358b8a8146d2b597d83090164cb432befe9e684ddd6e9185b2a02048",
    "signature": "0xa12be9101a99d7dc9ca130d20baa9d40cd8f47f7f46edba7616f664b7f9d7bb91b554e7ea9aa7ef350dab1a64e32e890ba313ed3443beedd6602eea7185dd8da1b",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}