{
  "manageEntity": {
    "action": "Save",
    "entityId": "1051599408",
    "entityType": "Track",
    "nonce": "0x2ffba98d9532afc6dd06d618d0718e7d5fc804145147cc89d4f491a5293971e8",
    "signature": "0x8e7208f6f7e4695c8634f86d18204450905a5db4b217f553dcfe2646db86c25a43f18c5f16ef83ebb68b0d5b7b6f333f7244d20402156d8f9d924fb8ae0611a81c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}