{
  "manageEntity": {
    "action": "Save",
    "entityId": "734505472",
    "entityType": "Track",
    "nonce": "0x3b0fdbca709d4772d66390caaf8946a9a2d0707cce108e012395c98a3e24e4ae",
    "signature": "0xc812b013afc898322297650c24ae0fa0d3e3bbe16bb96019bd10bf49d3415f9e54548b1b0ce125f2ba78a5268fa5a9616ebb730a161ccde9b0a36aacabd6af641c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}