{
  "manageEntity": {
    "action": "Save",
    "entityId": "368572",
    "entityType": "Track",
    "nonce": "0xe3aff451207dcc74c8e25c39c4c5ea4e1cddc1c3f8d7c980e8fbdab5d6166be1",
    "signature": "0x847bcfc1ee9167e468a9abbaefcc22f3dbfbd4745d8ca93bf97a5e1a995d8bed768e7643e04dc04197b65699519c4c80d2b0c04e2bcf0b4c6f3735d29cfae7a71c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}