{
  "manageEntity": {
    "action": "Save",
    "entityId": "1976011090",
    "entityType": "Track",
    "nonce": "0xb64c48bb6a0d97ee9e52158d335900c5fe2e2b5ada7702f8e344fd49b1195042",
    "signature": "0xc54f2b77bc361f3760714c5a585a722bf4224fc24c259b639af44f4c59428c7b6736c94f0b286d46fa0b31a2b5b57131e2500693f0519eaeb9776c82db53c43a1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}