{
  "manageEntity": {
    "action": "Save",
    "entityId": "1915117492",
    "entityType": "Track",
    "nonce": "0xee94cf401e8c5226290838101812c99cc3a9cba1f2803fd8b809696f3946da76",
    "signature": "0xe7347c590f83624e3b4c2855d29455a4d2172371cce32d194c1ca17b922e277467e8a9eae815b291d4f6bc2c840edd47f8c59fe82508cfa08ef0b2af67e49dae1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}