{
  "manageEntity": {
    "action": "Save",
    "entityId": "886939118",
    "entityType": "Track",
    "nonce": "0x20a99bca9627edb4ea95d04f7675068728ccaff7a5f2d381926115a7787878bb",
    "signature": "0xac0cf0d6249a1f6fa52dd68a85d88fd15cafad54471caa4dcd7a0f30db4d61943e8fc4eaffd1a317e6cf54c57bbe5495203c239249bf3e9b50eb134af001d45a1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}