{
  "manageEntity": {
    "action": "Save",
    "entityId": "860487",
    "entityType": "Track",
    "nonce": "0xb3143550f8c4cc98aadc91931eb1fce6be90a5c3f66160ccf55623452e30247c",
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    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}