{
  "manageEntity": {
    "action": "Save",
    "entityId": "193173",
    "entityType": "Track",
    "nonce": "0xa2bebfb2f3daec86302897874ab78a8e730c963466c3dbe54e14cd2926744b69",
    "signature": "0x0e3ecce8f9c3b1ebb51829e2b556615c2634ed68e7939626a734fe2a964994814261a87316d87951b51826eb92d67f057c88cc23cd466dc2cd956939cf3d4a151b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}