{
  "manageEntity": {
    "action": "Save",
    "entityId": "309337146",
    "entityType": "Track",
    "nonce": "0xa560da7454aa3425d3c1397b13c7167a5adeb8e6c11dfb7dfcc570bec8bda2dd",
    "signature": "0x89616a8ee9497472efcfbad5a583ea3132eaf267956553c1e2d494a14d2d435a5677dc36dbe8e57f6b7e4cb032e0b1e52bdf0de76c50d8df50a0dac724e9b80c1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}