{
  "manageEntity": {
    "action": "Save",
    "entityId": "56735366",
    "entityType": "Track",
    "nonce": "0x0c6bd8dd6155937cbc6f561f0f520c80945e6c3587188fded0220d4ea1512e95",
    "signature": "0xbae1849a73d50d2ab7e6b93468841cee0545abe0a15cd7f620e4ac01ee6ec0fb78ca416ba4c447013b171d2610cc6882e954f82d7a934d58eb70acb05ac43a8a1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}