{
  "manageEntity": {
    "action": "Save",
    "entityId": "252575",
    "entityType": "Track",
    "nonce": "0xb5d6611cb7525cf4d2bdf1b0a90391b056fc0368117ea0b3566f7f792f17aa82",
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    "signer": "0xbAA633dfD19281ECC20a6b689F49CE8725d526Cc",
    "userId": "127651"
  }
}