{
  "manageEntity": {
    "action": "Save",
    "entityId": "790604123",
    "entityType": "Track",
    "nonce": "0x80fcf6c31c870601af0fa4a252034edd42a13932965d7b935cd838e9ef36c694",
    "signature": "0x3e45342c3f2e4b65250b2ad6cf68b05702bdf9b300d0d22b30caeb52d778f24a316e9684d69153b77071bf7bade2431de696f140da80f6bdf6b0d970aee12a2b1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}