{
  "manageEntity": {
    "action": "Save",
    "entityId": "131901591",
    "entityType": "Track",
    "nonce": "0xd8ccb448d4b3f81a3ac42a1f780917a9bd283bec9bd4aa408cab7932995b50c0",
    "signature": "0x997112a52c2dda417efafa1cadc1c90da73cfcef936f00329447d1d1849a3c2a736ca507448ca2c55ebd6c79ea0081133bae874c2c33b999ed9d33813d3e7bc81b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}