{
  "manageEntity": {
    "action": "Save",
    "entityId": "1108940462",
    "entityType": "Track",
    "nonce": "0x7a924e6fc927dbc90008da7122f7bf18d3e579789e2d6a9036706e56b27c5bea",
    "signature": "0x3dbc22ceb766915eb009cc57467521406243a13e5b65a29ac7bf20e5ac57a51b1882f0a8ca657db253c2353a2f6d9b7afa2b1905012129e6370bb83eb93de1d21b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}