{
  "manageEntity": {
    "action": "Save",
    "entityId": "1083507",
    "entityType": "Track",
    "nonce": "0x07602b711019bc7d29a5d3629bd1deb3a53e98ad74d626ea62a679798fd8b969",
    "signature": "0x2983ec16649384f6e1a0f0ac775859ec2f1760b2c565020be010b165e9d7dd5f36499fb2d89ddcf53640e8105ee4f1fe3cdfd4905519e22f425d0fb87efad99a1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}