{
  "manageEntity": {
    "action": "Save",
    "entityId": "506709141",
    "entityType": "Track",
    "nonce": "0x055d8d227b358d3bf5695dbf4a0b9bbd2c4d774e39856c22571a49fdced9a9d8",
    "signature": "0xd91a1eb454ae939de45772f087c9a7dee5f9f9e1e0c3058c7986bafe57509e2d23da76db81d5b661309934ffe1d7a8fa1a4e95cf3a4e91299b0cface0528854d1b",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}