{
  "manageEntity": {
    "action": "Save",
    "entityId": "518470727",
    "entityType": "Track",
    "nonce": "0xf5a534a5e598f6685f73e132a0452938ea760e15c5a04d1d11986ed1f72c37e6",
    "signature": "0xc2ef0a39809c7d839a0f4125bced6bbba65d3fa5403138557131c5a1f06333ae07d8eff8ac4b879f55962b154aecb7aa4a41672e14e7a0df289dd263b2d5a0cd1b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}