{
  "manageEntity": {
    "action": "Save",
    "entityId": "73051",
    "entityType": "Track",
    "nonce": "0x5fbac6c39499afdc64200c493d900859839e1ee2487976f052e9d1834e0da362",
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    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}