{
  "manageEntity": {
    "action": "Save",
    "entityId": "1443274654",
    "entityType": "Track",
    "nonce": "0x3163001bfd0f46d407bc3d312dfae9fc81a7ee7d9bdcf921e532756eb1a569b3",
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    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
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  }
}