{
  "manageEntity": {
    "action": "Save",
    "entityId": "1234443215",
    "entityType": "Track",
    "nonce": "0xb57278bf9c35324ad9ebf03df125adec3f8b20888b166cfb9f93f4cac4132b51",
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    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}