{
  "manageEntity": {
    "action": "Save",
    "entityId": "1077750",
    "entityType": "Track",
    "nonce": "0x858033183b54dcaa2b4da32f55551f7c2163390e602290be6dd78e20fb599e38",
    "signature": "0x27637ba63785617bb70cdf8e962d8e022699df3c704b54dea84aead5f6cb944e79f5e86f496f65b10ad1e1b90332057848bb23c55c42c12b2f9fef30cfb6be1b1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}