{
  "manageEntity": {
    "action": "Save",
    "entityId": "67883407",
    "entityType": "Track",
    "nonce": "0x1fdf268828caf09983eb874b0aeb1328d61c7138f19f12fbf80fdd960a056aed",
    "signature": "0x04625ed342b75af58de1eee4a34e99c9c78bc0ca99a80f2c0b1cd7a2abc38834731d6b38499c6c3b9e6fa292ce8e378b9288ada8eb2effd05e2d2930b620d6641b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}