{
  "manageEntity": {
    "action": "Save",
    "entityId": "49738853",
    "entityType": "Track",
    "nonce": "0xd208f89297af0fcc6063a5fd3f1287273a9f6305c0cd01f528630cd14f109189",
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    "signer": "0xaA7D6Bc2dc720fFD853ce6320d0428687d86Ca65",
    "userId": "503514954"
  }
}