{
  "manageEntity": {
    "action": "Save",
    "entityId": "410225058",
    "entityType": "Track",
    "nonce": "0x1ebdcec26fccb262674cf5d88ea1ddc0a37c1d79943e6980519e18692cacee58",
    "signature": "0xcf7c65d9e24db43d76691de8c470c26701bfa3bafa209adfe968774ee6eafec973c99d0d34d38e1cc32a8b05bbc0c52bbff10423772aedc01da8874307a718481c",
    "signer": "0x5D4848bCf5c4abA1a0Fdf2B61408c9e4288aDb0E",
    "userId": "305415280"
  }
}