{
  "manageEntity": {
    "action": "Save",
    "entityId": "1403342559",
    "entityType": "Track",
    "nonce": "0x9302d41137f99cad7975e1ec477631cd7853fc468228e02f79ddf7c5bfb46c9d",
    "signature": "0xcfaa6b53dcbb68ce8930cbe5836c2f3f060e6fb597b4bf0dc3dde075039f9fa82e37e7a8770a6de547491f0e6949795650275ec562fec9f0fa47871fe8753ce31c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}