{
  "manageEntity": {
    "action": "Save",
    "entityId": "752972",
    "entityType": "Track",
    "nonce": "0xb2bdd19b4864aefb7438bccab48550f7d2dd061475a2af2b1b9545644c961238",
    "signature": "0x84b5b321de63729afe623f8bc10d1ca9ea2cee0bd0b52c3f170f671101d2e0844bc806742e54ca4df2d0760dfbe1c6433a301638a5f2da71871e64b6b800a2811b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}