{
  "manageEntity": {
    "action": "Save",
    "entityId": "1148842669",
    "entityType": "Track",
    "nonce": "0x0015f1dd68a8a804a11c9070dc7077865f7447408766278000780bb0bac35b0d",
    "signature": "0x4f2e8562171509796a51043355f313f4ac9ef34869d50411d4f9bee18d47bdca345b81d023a4f3f87fe7ca8567d6feb23ccfb5bbb456c0983dc596a255c5d6bb1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}