{
  "manageEntity": {
    "action": "Save",
    "entityId": "63047",
    "entityType": "Track",
    "nonce": "0x8d614fbd751afbfe755b64575e85b11c89b21ba48c358022d6801063d1462569",
    "signature": "0xc2a22002e0153ed7925647fe21f99c4962433bc3e4a5d5109f3ab0874d8549130a409b187ac2f4a4c34d00f26aa7d8df4d979d1c0e382dddf0cb8f268d186d771b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}