{
  "manageEntity": {
    "action": "Save",
    "entityId": "2004362182",
    "entityType": "Track",
    "nonce": "0x29d061930073c6e06b0dc86017d6527dbaf961cc34eab85be848541e5ccc9b1f",
    "signature": "0xa823499c8f889b9109ba0281cb1a4ee74f77a0fd67d56c0a64bfd002208297ef57310d94c7a7f0905ffa1b019b6c9910cfa99e5d86f21ccf736de8e16a4c8f0a1b",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}