{
  "manageEntity": {
    "action": "Save",
    "entityId": "262805142",
    "entityType": "Track",
    "nonce": "0x34643af6abef5f4b7cb7f1771182d74418260e0b26c707f8fe949bde63446068",
    "signature": "0x1eabafd2f0ad7a30c4db1a3a28e6217abb8835acebeac3f82356fd47b25ec76a1d0c7bcde0858095a8ad428a6063bfb94fe2664a6ef30330b335a5e48da4267f1c",
    "signer": "0xb23FFd6D016E95A4022Fbe25C4a1179AF8492788",
    "userId": "990308344"
  }
}