{
  "manageEntity": {
    "action": "Save",
    "entityId": "971852494",
    "entityType": "Track",
    "nonce": "0x23504f013e055b2a0019182bd8440ae5c7441c65064898152e0c53cb29124765",
    "signature": "0xa248ba480da8e3c014e4ac7668545f810fb2b501e5559798e85f3fc0917bcc041aba7675133b4b6f03144e25251b78540a341661afd9c16ff77afb74218fa4361c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}