{
  "manageEntity": {
    "action": "Save",
    "entityId": "696139",
    "entityType": "Track",
    "nonce": "0xe856f4c0894dc4ab659ef8dfbb807a85a601d41c43c4906b90f2f1d26f8009ea",
    "signature": "0xa884d183e93087a8032c8ad6f2ceb9fff4fd9e57b1c852782990c9ecf6c7e00346be505a50402a190ac1c56c6ebf08f3c977db77f6dc0dd12aa11067f68c9ed31c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}