{
  "manageEntity": {
    "action": "Save",
    "entityId": "438666",
    "entityType": "Track",
    "nonce": "0xd5519046f59c800630dcb77d094b59d64627f8422b9aceb439f677956e6dbf5b",
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    "signer": "0x7B3AFAc08245Ef9d1CFfF7f7cdDBCAADE68f94E3",
    "userId": "230426"
  }
}