{
  "manageEntity": {
    "action": "Save",
    "entityId": "346092819",
    "entityType": "Track",
    "nonce": "0x9926864f1cd2558eb10e24e57ebca04b833b82aa6308138a7a3611fd10ffbb6e",
    "signature": "0x6a5a695e7635bfc920da67a2d419336968ba99fd2e26d483d1f2b7f5ab7f49635246def5592f0fafe1f777687d4298228afccc09bff7973767bcee1f796b52171c",
    "signer": "0x1b5371408834a4Df8CDC0B2f6909a2097Ce99833",
    "userId": "69922"
  }
}