{
  "manageEntity": {
    "action": "Save",
    "entityId": "1630282403",
    "entityType": "Track",
    "nonce": "0x63fd2e57104fc24c1f03a4f6a2bb8f157fa6b76f641b60b304681632aba91fe8",
    "signature": "0x8dac9abb6d746d4ca8c0b8d6c45f9550985fa41c5c67e06c3a7639ecc250ff873d861b5b0340a8e359cee83f244aa8ba4390a2cbdd0a5a3c2b683bb8b0d40e3d1b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}