{
  "manageEntity": {
    "action": "Save",
    "entityId": "985282546",
    "entityType": "Track",
    "nonce": "1792360654648894533",
    "signature": "0x21ae52decf3430f587fa2d341553252e046de84fb0a9d8960534bf29445f2192031ade8fce6329c1b3b3c49f35e898802906c17e0d0c47064d9cbfb2871e10b41c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}