{
  "manageEntity": {
    "action": "Save",
    "entityId": "1934188319",
    "entityType": "Track",
    "nonce": "0x578f9adf5fca53a9287cbdca666f17355a99288de49617cc70b0a11681a46caf",
    "signature": "0x3956fc56032183ee365c3d5bd77f0f681b627ef975d5208c7b511b6770eb96403bd99421516d17ccd5f8c9cfddf4622a5ea773af528c52d044787db2e21e32d01c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}